mercury crank sealing rings?

[s10gto]

Is it normal to see some wear in the block for these rings. Also do you replace them on rebuild? Thanks

[Jay Smith]

Yes normal for them to "eat" into the aluminum block and no you don't replace them at rebuild time. I DO hone them , the average home rebuilder can go to his hardware store and buy a 12" X 12" sheet of glass and some 400 grit wet and dry sand paper lay the ring flat and rub in a figure 8. You will see the ring will hit the high and miss the low. Continue until the total ring surface is contacting paper then your flat...

Jay

[s10gto]

Thanks Jay! :smiletest:

[s10gto]

Any prep work to rings or block when using all new sealing rings?

Thanks